Eyeglasses



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EYEGLASSES.

Patented Feb. 6, 1883;.

mucmx mwxm lUrrnn STATES GEORGE JOHNSTON, OF DETROIT, MICHIGAN.

EYEGLASSES.

SPECIFICATION forming part of Letters .Patent No. 271,712, dated February 6, 1883.

Application filed October 18, 1882.

To all whom t may concern:

Be it known that I, GEORGE JOHNSTON, of Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Eyeglasses; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the 'accompanying drawings, which form a part of this specification.

The nature of this invention relates to certain new and useful improvements in the construction ot' that class otl optical instruments known as eyeglasses;7 by means ot' which a i-ea'dy adjustment may be obtained ofthe parts which secure the instrument to the nose ofthe wearer without producing undue pressure at any point, as the adjustments are obtained at both ends ofthe nose-pieces in order to adjust such nose-pieces to any peculiar form or size of nose. Another adjustment is had by the peculiar construction and operation of the spring, by which a pupillary adjustment is obtained without diflculty.

Figure l is a front elevation ot' my improved eyeglass, partly broken away; Fig. 2, a plan with thespring broken away. Fig. S'shows the manner ot' securing the adjustability at the lower end ot' the nose-pieces.

In the accompanying drawings, which t'orm a part ot this specitication, A represents the bows, and B the handle, .ot' a pair of noseglasses ot' the ordinary construction. To eachl bow is secured a stud, O, above and another stud, D, below, as shown.

E are the nose-pieces, the coincident faces of which are roughened in any ot' the known ways. The upper ends of each of these nosepieces turn outwardly, and are provided with a slot; and these ends of the two nose-pieces rest upon the upper face of the studs O, or in channels cut therein. The lower ends of the nose-pieces also turn outwardly, and are slotted, as shown, and a small set-screw, a, secures these lower ends to the lower studs, D, by passing through the slctsin the same into the studs, so that by loosening this screw any adinstability of the nose-piece may be had and secured by refastening the screw.

(No model.)

-piece`to the stud on the coincidentbolt.

It will be seen by this construction that dat noses and broad noses, noses with nearly-ver- .tical side walls, or with those much more inclined, can readily be fitted by means of these adj ustment-s without cause ot' any undue pressure upon any part, while the adjustments of the spring will allow for the pupillary adjustment, as may be required. By this 'construction it will be observed that the nose-pieces at their upper extremities and the spring-bow F are adjusted by a single device, b, and that said pieces are adjusted below by a separate device, a.

What I claim as my invention is-l 1. A nose-glass wherein the bows are provided with nose-pieces which are adjustable a-t both ends, substantially as and for the purposes set forth.

2. In a nose-glass. the combination of roughened nose-pieces having outwardly-bent ends, slotted as shown, and the spring having slotted ends, with thebows having extending lugs above and below, and the adjustable securing means t b, the latter serving the function ot' adj ustably securi'n g both the spring and nosepieces to the bows, as specited.

3. In a nose-glass, the combination of the bows A, having lugs O D, the nose-pieces E.

having outwardly-bent slotted ends, and the u spring F, having slotted ends, with the screws c b, and the whole adapted to serve adjustably, as and for the purposes set forth.

GEO. JOHNSTON.

Witnesses:

H. S. SPR/teun, CHAs. J. HUNT. 

